syzkaller login: [ 72.188502] BUG: Bad rss-counter state mm:0000000023a3e43d type:MM_FILEPAGES val:33 [ 72.189824] BUG: Bad rss-counter state mm:0000000023a3e43d type:MM_ANONPAGES val:22 [ 72.238498] ================================================================== [ 72.239418] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 72.240336] Read of size 8 at addr ffff888016836968 by task sshd/220 [ 72.241259] [ 72.241476] CPU: 1 PID: 220 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 72.242490] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 72.243451] Call Trace: [ 72.243767] [ 72.244050] dump_stack_lvl+0x91/0xf0 [ 72.244537] print_report+0xcc/0x620 [ 72.245044] ? __virt_addr_valid+0x102/0x340 [ 72.245595] ? vma_interval_tree_remove+0xc75/0xec0 [ 72.246205] ? vma_interval_tree_remove+0xc75/0xec0 [ 72.246812] kasan_report+0xbe/0xf0 [ 72.247291] ? vma_interval_tree_remove+0xc75/0xec0 [ 72.247914] vma_interval_tree_remove+0xc75/0xec0 [ 72.248513] vma_prepare+0xc54/0x11a0 [ 72.248998] __split_vma+0x5af/0x950 [ 72.249467] ? __pfx___split_vma+0x10/0x10 [ 72.249990] ? find_held_lock+0x2c/0x110 [ 72.250509] do_vmi_align_munmap+0x2ba/0x11f0 [ 72.251071] ? lock_is_held_type+0x9f/0x120 [ 72.251599] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 72.252204] ? mtree_range_walk+0x632/0x900 [ 72.252750] ? mas_walk+0x5c7/0x7c0 [ 72.253230] do_vmi_munmap+0x1f1/0x2b0 [ 72.253720] mmap_region+0x1f9/0x2660 [ 72.254195] ? vm_mmap_pgoff+0x15c/0x3a0 [ 72.254709] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 72.255423] ? __pfx_lock_acquire+0x10/0x10 [ 72.255952] ? __pfx_mmap_region+0x10/0x10 [ 72.256489] ? security_mmap_addr+0x7d/0xa0 [ 72.257055] ? get_unmapped_area+0x1f5/0x3f0 [ 72.257609] do_mmap+0x854/0xf00 [ 72.258046] vm_mmap_pgoff+0x1a6/0x3a0 [ 72.258541] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 72.259101] ksys_mmap_pgoff+0x3af/0x500 [ 72.259613] do_syscall_64+0x3f/0x90 [ 72.260089] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 72.260737] RIP: 0033:0x7f78a5351d82 [ 72.261198] Code: eb aa 66 0f 1f 44 00 00 41 f7 c1 ff 0f 00 00 75 27 55 48 89 fd 53 89 cb 48 85 ff 74 33 41 89 da 48 89 ef b8 09 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 56 5b 5d c3 0f 1f 00 c7 05 ae 03 01 00 16 00 [ 72.263343] RSP: 002b:00007ffdbfe7f338 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 72.264252] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f78a5351d82 [ 72.265118] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f78a478b000 [ 72.265977] RBP: 00007f78a478b000 R08: 0000000000000009 R09: 0000000000001000 [ 72.266833] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e3688b3ec0 [ 72.267685] R13: 00007ffdbfe7f350 R14: 00007ffdbfe7f380 R15: 00007ffdbfe7f6e0 [ 72.268549] [ 72.268868] [ 72.269093] Allocated by task 213: [ 72.269527] kasan_save_stack+0x22/0x50 [ 72.270050] kasan_set_track+0x25/0x30 [ 72.270548] __kasan_slab_alloc+0x59/0x70 [ 72.271087] kmem_cache_alloc+0x16b/0x370 [ 72.271617] vm_area_dup+0x20/0x160 [ 72.272089] __split_vma+0x170/0x950 [ 72.272568] split_vma+0xc6/0x110 [ 72.273030] mprotect_fixup+0x8d2/0xb30 [ 72.273547] do_mprotect_pkey+0x87e/0xd40 [ 72.274073] __x64_sys_mprotect+0x78/0xc0 [ 72.274615] do_syscall_64+0x3f/0x90 [ 72.275102] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 72.275767] [ 72.275989] Freed by task 213: [ 72.276379] kasan_save_stack+0x22/0x50 [ 72.276923] kasan_set_track+0x25/0x30 [ 72.277421] kasan_save_free_info+0x2b/0x50 [ 72.277968] __kasan_slab_free+0x10a/0x190 [ 72.278515] kmem_cache_free+0x10d/0x4d0 [ 72.279029] rcu_core+0x8c8/0x2860 [ 72.279485] __do_softirq+0x1b7/0x7d4 [ 72.279976] [ 72.280194] Last potentially related work creation: [ 72.280905] kasan_save_stack+0x22/0x50 [ 72.281426] __kasan_record_aux_stack+0x8e/0xa0 [ 72.282014] __call_rcu_common.constprop.0+0x6a/0xb90 [ 72.282666] remove_vma+0x139/0x170 [ 72.283135] do_vmi_align_munmap+0xd4a/0x11f0 [ 72.283697] do_vmi_munmap+0x1f1/0x2b0 [ 72.284181] __vm_munmap+0x138/0x3a0 [ 72.284663] __x64_sys_munmap+0x59/0x80 [ 72.285190] do_syscall_64+0x3f/0x90 [ 72.285681] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 72.286326] [ 72.286545] The buggy address belongs to the object at ffff888016836910 [ 72.286545] which belongs to the cache vm_area_struct of size 168 [ 72.288016] The buggy address is located 88 bytes inside of [ 72.288016] freed 168-byte region [ffff888016836910, ffff8880168369b8) [ 72.289441] [ 72.289655] The buggy address belongs to the physical page: [ 72.290323] page:0000000020647cb3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16836 [ 72.291410] memcg:ffff8880169d7301 [ 72.291832] flags: 0x100000000000200(slab|node=0|zone=1) [ 72.292491] page_type: 0xffffffff() [ 72.292966] raw: 0100000000000200 ffff88800879fc80 ffffea00003915c0 dead000000000002 [ 72.293892] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880169d7301 [ 72.294805] page dumped because: kasan: bad access detected [ 72.295478] [ 72.295689] Memory state around the buggy address: [ 72.296280] ffff888016836800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 72.297151] ffff888016836880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 72.298028] >ffff888016836900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 72.298888] ^ [ 72.299677] ffff888016836980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 72.300544] ffff888016836a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 72.301406] ================================================================== [ 72.302439] Disabling lock debugging due to kernel taint [ 74.488439] BUG: Bad rss-counter state mm:00000000aada3f04 type:MM_FILEPAGES val:33 [ 74.489369] BUG: Bad rss-counter state mm:00000000aada3f04 type:MM_ANONPAGES val:22 [ 74.979455] BUG: Bad rss-counter state mm:00000000beb5032c type:MM_FILEPAGES val:33 [ 74.980765] BUG: Bad rss-counter state mm:00000000beb5032c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:18068' (ECDSA) to the list of known hosts. 2023/06/19 11:08:59 fuzzer started 2023/06/19 11:08:59 dialing manager at localhost:44161 2023/06/19 11:08:59 checking machine... 2023/06/19 11:08:59 checking revisions... [ 75.758799] kmemleak: Automatic memory scanning thread ended 2023/06/19 11:09:00 testing simple program... [ 75.817599] cgroup: Unknown subsys name 'net' [ 75.887042] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:08:26 Registers: info registers vcpu 0 RAX=ffffffff861371ab RBX=0000000000000001 RCX=ffffffff861371a8 RDX=0000000000000000 RSI=0000000000000000 RDI=ffffffff861371aa RBP=ffff888016717130 RSP=ffff888016717068 R8 =0000000000000001 R9 =ffff888016717118 R10=0000000000038001 R11=0000000000020cf8 R12=ffff888016717138 R13=ffff888016717120 R14=ffff888016717578 R15=ffff8880167170d8 RIP=ffffffff811311e5 RFL=00000293 [--S-A-C] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f1fb4639900 00000000 00000000 GS =0000 ffff88806ce00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe0000003000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000001000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007f1fb4bf0618 CR3=000000000e826000 CR4=00350ef0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=00000000000000000000000000000000 XMM01=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 0000000000000000 00000000 00000000 GS =0000 ffff88806cf00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe000004a000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000048000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007f54c5a5c7d0 CR3=000000000e7ca000 CR4=00350ee0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=00000000000000000000000000000000 XMM01=64a674dcb8969d907c427c80c652f633 XMM02=0000000000126e58eff9b2d0a8fce9cb XMM03=0000000000126f282c67c8bc2e329bc3 XMM04=b02dfdec309c065100000000000ae988 XMM05=9bb9d90d564d38f9000000000013e110 XMM06=c291bd5c70af25b9000000000013ce40 XMM07=e042d86d42eb936e000000000012db48 XMM08=524f8262bdd10dc40000000000126f28 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000